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A well is drilled through a hydrocarbon-bearing formation which is at its irreducible water saturation and it has a porosity of 28%. Rock core data indicates that (a=0.81, m=2, and n=2). The mud used for drilling is water-base, with a salt concentration (NaCl) of 50,000 ppm. The connate water has a salt concentration (NaCl) of 20,000 ppm. The shallow and deep resistivity logs readings are 12 ohm-m and 50 Ohm-m respectively. You should assume that the deep resistivity tool will be sensing the virgin zone, which does not experience any mud-filtrate invasion, and that the shallow resistivity tool will be sensing the flushed zone. The formation temperature is 145° F. What is the hydrocarbon saturation of the formation and what is the water saturation in the flushed zone?

A well is drilled through a hydrocarbon-bearing formation which is at its irreducible water saturation and it has a porosity of 28%. Rock core data indicates that (a=0.81, m=2, and n=2). The mud used for drilling is water-base, with a salt concentration (NaCl) of 50,000 ppm. The connate water has a salt concentration (NaCl) of 20,000 ppm. The shallow and deep resistivity logs readings are 12 ohm-m and 50 Ohm-m respectively. You should assume that the deep resistivity tool will be sensing the virgin zone, which does not experience any mud-filtrate invasion, and that the shallow resistivity tool will be sensing the flushed zone. The formation temperature is 145° F. What is the hydrocarbon saturation of the formation and what is the water saturation in the flushed zone?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A well is drilled through a hydrocarbon-bearing formation which is at its irreducible

water saturation and it has a porosity of 28%. Rock core data indicates that (a=0.81, m=2,

and n=2). The mud used for drilling is water-base, with a salt concentration (NaCl) of

50,000 ppm. The connate water has a salt concentration (NaCl) of 20,000 ppm. The shallow

and deep resistivity logs readings are 12 ohm-m and 50 Ohm-m respectively. You should

assume that the deep resistivity tool will be sensing the virgin zone, which does not

experience any mud-filtrate invasion, and that the shallow resistivity tool will be sensing the

flushed zone. The formation temperature is 145° F. What is the hydrocarbon saturation of

the formation and what is the water saturation in the flushed zone?

 

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